JP2018110205A - Protective glass for solar cell module and manufacturing method thereof - Google Patents

Protective glass for solar cell module and manufacturing method thereof Download PDF

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JP2018110205A
JP2018110205A JP2017091780A JP2017091780A JP2018110205A JP 2018110205 A JP2018110205 A JP 2018110205A JP 2017091780 A JP2017091780 A JP 2017091780A JP 2017091780 A JP2017091780 A JP 2017091780A JP 2018110205 A JP2018110205 A JP 2018110205A
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glass
solar cell
glass beads
sealing material
protective
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JP6425764B2 (en
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イル−ファ・イ
Yil-Hwa Lee
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LS Electric Co Ltd
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LSIS Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • H01L31/049—Protective back sheets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/20—Uniting glass pieces by fusing without substantial reshaping
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C12/00—Powdered glass; Bead compositions
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/02—Surface treatment of glass, not in the form of fibres or filaments, by coating with glass
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G02B5/0226—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures having particles on the surface
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
    • H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
    • H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
    • H01L25/075—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00
    • H01L25/0753—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00 the devices being arranged next to each other
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02—Details
    • H01L31/0236—Special surface textures
    • H01L31/02366—Special surface textures of the substrate or of a layer on the substrate, e.g. textured ITO/glass substrate or superstrate, textured polymer layer on glass substrate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • H01L31/0481—Encapsulation of modules characterised by the composition of the encapsulation material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/52—PV systems with concentrators

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  • Optics & Photonics (AREA)
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  • Photovoltaic Devices (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide protective glass for a solar cell module which improves the power generation efficiency of a solar cell by minimizing reflection of light incident on the protective glass, and a manufacturing method thereof.SOLUTION: Protective glass for a solar cell module includes a plurality of glass beads which are formed in the spherical shape or hemispherical shape and arrayed in the horizontal direction. The plurality of glass beads are arranged in at least any of the upper part and lower part of a sealing material. A manufacturing method of the protective glass for the solar cell module includes: a step of providing the plurality of glass beads formed in the spherical shape or hemispherical shape; a step of arraying the glass beads in the horizontal direction; and a step of forming the protective glass by injecting the melted glass solution into the glass beads.SELECTED DRAWING: Figure 3

Description

本発明は、入光効率の増大した太陽電池モジュール用保護ガラス及びその製造方法に関する。   The present invention relates to a protective glass for a solar cell module having an increased light incident efficiency and a method for producing the same.

最近、エネルギーの節減及び効率、地球温暖化防止の側面で、自然エネルギーを利用する技術、例えば、光を利用した電気発生、風力を利用した電気発生等の代替エネルギーを開発するに多くの努力がなされている。   Recently, many efforts have been made to develop alternative energy such as energy generation using light and electricity generation using wind power in terms of energy saving and efficiency and prevention of global warming. Has been made.

この中でも、太陽電池モジュールは、石炭や石油のような化石燃料を使わず、無公害で無限のエネルギー源である太陽熱を利用するため、未来の新代替エネルギー源として脚光を浴びており、現在は、自動車又は建築物等の発電電力を得ることに利用されている。   Among them, solar cell modules are attracting attention as a new alternative energy source in the future because they use solar heat, a pollution-free and infinite energy source, without using fossil fuels such as coal and oil. It is used to obtain power generated by automobiles or buildings.

図１に示されたように、このような太陽電池モジュール１は下部基板１０と、下部基板１０の上部に配置される太陽電池セル２０と、下部基板１０の上部に配置されるものの、太陽電池セル２０の周りを囲むように形成されたフレーム３０と、太陽電池セル２０の上部及び下部にそれぞれ配置されて太陽電池セル２０を密封する封止材４０と、封止材４０の上部に配置されて太陽電池セル２０を保護する保護ガラス５０を含む。   As shown in FIG. 1, such a solar cell module 1 includes a lower substrate 10, solar cells 20 disposed on the upper portion of the lower substrate 10, and solar cells that are disposed on the upper portion of the lower substrate 10. A frame 30 formed so as to surround the cell 20, a sealing material 40 that is respectively disposed above and below the solar battery cell 20 to seal the solar battery cell 20, and disposed above the sealing material 40. The protective glass 50 which protects the photovoltaic cell 20 is included.

一方、前記保護ガラス５０は、一般的に平板ガラスが主に使われる。しかし、光の入射する保護ガラス５０が平板形態に形成されると、入射光の約８％が保護ガラス５０の表面により反射する問題があった。   On the other hand, the protective glass 50 is generally made of flat glass. However, when the protective glass 50 on which light is incident is formed in a flat plate shape, there is a problem that about 8% of the incident light is reflected by the surface of the protective glass 50.

また、平板形態の保護ガラス５０は、衝撃を吸収する空間がなく、外部から衝撃が加わる場合には破損する部位が大きいという問題があった。   Further, the flat protective glass 50 has a problem that there is no space for absorbing an impact, and a portion that is damaged when an impact is applied from the outside is large.

本発明の課題は、保護ガラスを球状または半球状に形成することで、保護ガラスに入射する光の反射を最小限にし、太陽電池セルの発電効率の向上した太陽電池モジュール用保護ガラス及びその製造方法を提供することにある。   An object of the present invention is to form a protective glass into a spherical or hemispherical shape, thereby minimizing the reflection of light incident on the protective glass and improving the power generation efficiency of the solar cells, and the production thereof. It is to provide a method.

前記課題を達するために本発明による太陽電池モジュール用保護ガラスは、球状または半球状からなり、水平方向に配列された複数のガラスビーズを含む。そして、複数のガラスビーズは、封止材の上部及び下部のうち少なくともいずれかに配置される。   In order to achieve the above object, the protective glass for a solar cell module according to the present invention comprises a plurality of glass beads which are spherical or hemispherical and arranged in a horizontal direction. The plurality of glass beads are disposed at least one of the upper part and the lower part of the sealing material.

また、太陽電池モジュール用保護ガラスの製造方法は、球状または半球状からなる複数のガラスビーズを設ける段階と、ガラスビーズを水平方向に配列する段階、及びガラスビーズに溶融されたガラス溶液を注入して保護ガラスを形成する段階を含む。   The method for producing protective glass for a solar cell module includes a step of providing a plurality of spherical or hemispherical glass beads, a step of arranging glass beads in a horizontal direction, and injecting a molten glass solution into the glass beads. Forming a protective glass.

本発明によれば、球状または半球状からなるガラスビーズを利用して、太陽電池モジュール用保護ガラスを形成することで、外部から衝撃が加わるときにガラスビーズらの間の空間へ衝撃が吸収される。よって、平板型保護ガラスに比べて衝撃のバラツキ現象が減るため、外部の衝撃により破損する部位を減らすことができる。   According to the present invention, by using glass beads made of spherical or hemispherical shapes to form a protective glass for a solar cell module, the impact is absorbed into the space between the glass beads when an impact is applied from the outside. The Therefore, since the variation phenomenon of the impact is reduced as compared with the flat type protective glass, it is possible to reduce the portion damaged by the external impact.

また、球状または半球状のガラスビーズは、多様な方向から入射する光を屈折させるため、入射する光が外部から反射することを抑制することができる。これにより、平板型保護ガラスを具備した太陽電池モジュールより太陽電池セルが多量の光を受光できるため、太陽電池セルの発電効率を増大することができる。   In addition, since spherical or hemispherical glass beads refract light incident from various directions, the incident light can be prevented from being reflected from the outside. Thereby, since the photovoltaic cell can receive a large amount of light from the photovoltaic module provided with the flat type protective glass, the power generation efficiency of the photovoltaic cell can be increased.

さらに、熱処理において、ガラスビーズを封止材の上部及び下部のうち少なくともいずれかに付着するため、別途の接着剤なくても封止材にガラスビーズを堅固に接着することができる。   Further, since the glass beads are attached to at least one of the upper part and the lower part of the sealing material in the heat treatment, the glass beads can be firmly adhered to the sealing material without using an additional adhesive.

従来技術による太陽電池モジュールの断面図。Sectional drawing of the solar cell module by a prior art. 本発明の一実施例による太陽電池モジュール用保護ガラスを示した斜視図。The perspective view which showed the protective glass for solar cell modules by one Example of this invention. 図２に示された保護ガラスが設けられた太陽電池モジュールを示した断面図。Sectional drawing which showed the solar cell module provided with the protective glass shown by FIG. 図２に示された保護ガラスに入射する光の進行方向を示した図面。The drawing which showed the advancing direction of the light which injects into the protective glass shown by FIG. 本発明の別の実施例による太陽電池モジュール用保護ガラスを示した斜視図。The perspective view which showed the protective glass for solar cell modules by another Example of this invention. 図５に示された保護ガラスが設けられた太陽電池モジュールを示した断面図。Sectional drawing which showed the solar cell module provided with the protective glass shown by FIG. 本発明の一実施例による保護ガラスを製造するための太陽電池モジュール用保護ガラスの製造方法に関するブロック線図。The block diagram regarding the manufacturing method of the protection glass for solar cell modules for manufacturing the protection glass by one Example of this invention. 本発明の別の実施例による保護ガラスを製造するための太陽電池モジュール用保護ガラスの製造方法に関するブロック線図。The block diagram regarding the manufacturing method of the protection glass for solar cell modules for manufacturing the protection glass by another Example of this invention.

以下、添付図面を参照しながら望ましい実施例による太陽電池モジュール用保護ガラス及びその製造方法について詳しく説明すると、次のとおりである。ここで、同様な構成に対しては同じ符号を使って、繰り返される説明、発明の要旨を曖昧にする公知の機能及び構成に対する詳細な説明は省略する。発明の実施形態は、当業者において平均的な知識を有する者に本発明をより完全に説明するために提供するものである。よって、図面における要素らの形状及び大きさ等は、より明確な説明のために誇張されることがある。   Hereinafter, a protective glass for a solar cell module and a method for manufacturing the same according to a preferred embodiment will be described in detail with reference to the accompanying drawings. Here, the same reference numerals are used for similar configurations, and repeated descriptions and detailed descriptions of known functions and configurations that obscure the gist of the invention are omitted. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Accordingly, the shape and size of elements in the drawings may be exaggerated for a clearer description.

図２は、本発明の一実施例による太陽電池モジュール用保護ガラスを示した斜視図であり、図３は、図２に示された保護ガラスが設けられた太陽電池モジュールを示した断面図である。そして、図４は、図２に示された保護ガラスに入射する光の進行方向を示した図面である。   FIG. 2 is a perspective view showing a protective glass for a solar cell module according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view showing the solar cell module provided with the protective glass shown in FIG. is there. FIG. 4 is a view showing the traveling direction of light incident on the protective glass shown in FIG.

図２ないし図４に示されたように、太陽電池モジュール用保護ガラス１００Ａは、フレーム３０内に設けられた太陽電池セル２０を密封する封止材４０に配置されて、太陽電池セル２０を保護する役割をするものである。そして、太陽電池モジュール用保護ガラス１００Ａは、球状または半球状からなる複数のガラスビーズ１１０を含む。   As shown in FIGS. 2 to 4, the solar cell module protective glass 100 </ b> A is disposed on the sealing material 40 that seals the solar cells 20 provided in the frame 30 to protect the solar cells 20. It plays a role. And the protective glass 100A for solar cell modules contains the some glass bead 110 which consists of spherical shape or a hemispherical shape.

複数のガラスビーズ１１０は、水平方向に配列されて、封止材４０の上部及び下部のうち少なくともいずれかに配置されてもよい。   The plurality of glass beads 110 may be arranged in the horizontal direction and arranged in at least one of the upper part and the lower part of the sealing material 40.

すなわち、複数のガラスビーズ１１０は、図３に示されたように、封止材４０の上部に配置されてもよい。そして、図示しないが、複数のガラスビーズ１１０は、封止材４０の下部に配置されるか、封止材４０の上部及び下部にそれぞれ配置されてもよい。ここで、複数のガラスビーズ１１０は、隣り合うガラスビーズ各々の外周面が互いに接触されるように形成することが望ましいが、互いに離隔して配置されてもよい。   That is, the plurality of glass beads 110 may be disposed on the upper portion of the sealing material 40 as shown in FIG. And although not shown in figure, the some glass bead 110 may be arrange | positioned at the lower part of the sealing material 40, or may be arrange | positioned at the upper part and the lower part of the sealing material 40, respectively. Here, the plurality of glass beads 110 are preferably formed so that the outer peripheral surfaces of the adjacent glass beads are in contact with each other, but may be arranged apart from each other.

具体的に、ガラスビーズ１１０は、封止材４０の上部及び下部のうち少なくともいずれかに配置された状態で熱処理されて、封止材４０に付着されてもよい。つまり、封止材４０の上部及び下部のうち少なくともいずれかにガラスビーズ１１０を配置した後に熱処理する。これにより、封止材４０とガラスビーズ１１０のうちいずれかが溶融されて、封止材４０にガラスビーズ１１０が付着することができる。ここで、封止材４０は、一般的にＥＶＡ、エポキシ、アクリル等のように透明樹脂の素材からなるため、ガラスビーズ１１０より封止材４０の融点が低く、熱処理すれば封止材４０が溶融される。   Specifically, the glass beads 110 may be attached to the sealing material 40 by heat treatment in a state where the glass beads 110 are disposed in at least one of the upper part and the lower part of the sealing material 40. That is, heat treatment is performed after the glass beads 110 are disposed on at least one of the upper part and the lower part of the sealing material 40. Thereby, either the sealing material 40 or the glass beads 110 is melted, and the glass beads 110 can adhere to the sealing material 40. Here, since the sealing material 40 is generally made of a transparent resin material such as EVA, epoxy, acrylic, etc., the melting point of the sealing material 40 is lower than that of the glass beads 110, and the sealing material 40 can be obtained by heat treatment. Melted.

前述のように、太陽電池モジュール用保護ガラス１００Ａを球状または半球状からなるガラスビーズ１１０を利用して形成すれば、図３に示されたように、各ガラスビーズ１１０らの接触面の間には空間が形成される。   As described above, if the protective glass 100A for the solar cell module is formed by using the spherical or hemispherical glass beads 110, as shown in FIG. A space is formed.

これにより、外部から衝撃が加わると、ガラスビーズ１１０らの間の空間へ衝撃が吸収されるため、平板型保護ガラスに比べて衝撃のバラツキ現象が減り、外部の衝撃により破損する部位を減らすことができる。   As a result, when an impact is applied from the outside, the impact is absorbed into the space between the glass beads 110 and the like, so that the variation phenomenon of the impact is reduced compared to the flat type protective glass, and the portion damaged by the external impact is reduced. Can do.

また、図４に示されたように、球状または半球状のガラスビーズ１１０は、多様な方向で入射する光を屈折して、外部に反射することを抑制することができる。特に、０°の角度に入射する光まで反射することを防止し、太陽電池セル２０を受光することができるため、太陽電池セル２０の発電効率を増大することができる。   Further, as shown in FIG. 4, the spherical or hemispherical glass beads 110 can refract light incident in various directions and suppress reflection to the outside. In particular, since it is possible to prevent the light incident at an angle of 0 ° from being reflected and to receive the solar battery cell 20, the power generation efficiency of the solar battery cell 20 can be increased.

さらに、熱処理において、ガラスビーズ１１０を封止材４０の上部及び下部のうち少なくともいずれかに付着するため、別途の接着剤なくても封止材４０にガラスビーズ１１０を堅固に接着することができる。   Further, since the glass beads 110 are attached to at least one of the upper part and the lower part of the sealing material 40 in the heat treatment, the glass beads 110 can be firmly adhered to the sealing material 40 without using an additional adhesive. .

一方、ガラスビーズ１１０は、低鉄分強化ガラス（Ｔｅｍｐｅｒｅｄ ｌｏｗ-ｉｒｏｎ ｇｌａｓｓ）で形成されてもよい。これにより、外部の衝撃等から太陽電池セル２０を保護することができ、入射する光の反射を防止して光透過率を高めることができる。   Meanwhile, the glass beads 110 may be formed of a low iron tempered glass (Tempered low-iron glass). Thereby, the photovoltaic cell 20 can be protected from an external impact or the like, and reflection of incident light can be prevented and light transmittance can be increased.

そして、入射する光の反射を最小限にするためにガラスビーズ１１０は、無反射コーティング（Ａｎｔｉ-Ｒｅｆｌｅｃｔｉｏｎ Ｃｏａｔｉｎｇ）処理されてもよい。   In order to minimize reflection of incident light, the glass beads 110 may be subjected to an anti-reflection coating process.

このように、ガラスビーズ１１０が低鉄分強化ガラスで形成されて、無反射コーティング処理されることで、光反射率が低下し、太陽電池セル２０の発電効率はさらに増大することができる。   As described above, the glass beads 110 are formed of the low iron content tempered glass and are subjected to the antireflection coating treatment, so that the light reflectance is lowered and the power generation efficiency of the solar battery cell 20 can be further increased.

ガラスビーズ１１０の直径は、３．２ｍｍ〜８．０ｍｍからなる。これは、ガラスビーズ１１０の直径が３．２ｍｍ未満であると、ガラスビーズ１１０の平坦度が大きくなって屈折率が減り、ガラスビーズ１１０の直径が８．０ｍｍを超えると、保護ガラスの高さが高くなり、太陽電池モジュールの全体嵩が大きくなるためである。   The glass beads 110 have a diameter of 3.2 mm to 8.0 mm. This is because if the diameter of the glass beads 110 is less than 3.2 mm, the flatness of the glass beads 110 increases and the refractive index decreases, and if the diameter of the glass beads 110 exceeds 8.0 mm, the height of the protective glass is increased. This is because the total volume of the solar cell module increases.

図５は、本発明の別の実施例による太陽電池モジュール用保護ガラスを示した斜視図であり、図６は、図５に示された保護ガラスが設けられた太陽電池モジュールを示した断面図である。本実施例では、前述した実施例との差異内容を中心に説明する。   FIG. 5 is a perspective view showing a protective glass for a solar cell module according to another embodiment of the present invention, and FIG. 6 is a cross-sectional view showing the solar cell module provided with the protective glass shown in FIG. It is. In the present embodiment, the description will focus on the content of differences from the above-described embodiment.

図５ないし図６に示されたように、太陽電池モジュール用保護ガラス１００Ｂは、封止材４０の上部及び下部のうち少なくともいずれかに付着するガラス基板１２０をさらに含み、ガラスビーズ１１０は、ガラス基板１２０の一面に配置されてもよい。この場合、ガラスビーズ１１０は、付着面積を向上させるために半球状からなってもよい。   5 to 6, the solar cell module protective glass 100B further includes a glass substrate 120 attached to at least one of an upper part and a lower part of the sealing material 40, and the glass beads 110 are made of glass. It may be disposed on one surface of the substrate 120. In this case, the glass beads 110 may be hemispherical in order to improve the adhesion area.

ガラスビーズ１１０は、ガラス基板１２０の上部に配置されることが望ましいが、ガラス基板１２０の下部に配置されてもよい。そして、ガラスビーズ１１０は、ガラス基板１２０の上部及び下部にそれぞれ配置されてもよい。   The glass beads 110 are desirably disposed on the upper portion of the glass substrate 120, but may be disposed on the lower portion of the glass substrate 120. The glass beads 110 may be disposed on the upper and lower portions of the glass substrate 120, respectively.

このように、太陽電池モジュール用保護ガラス１００Ｂがガラス基板１２０をさらに備えることで、太陽電池モジュール用保護ガラス１００Ｂを封止材４０に付着すると、フレーム３０の内部に異物が侵透することを防ぐことができる。   Thus, when the protective glass 100B for solar cell modules further includes the glass substrate 120, when the protective glass 100B for solar cell modules adheres to the sealing material 40, foreign matter is prevented from penetrating into the frame 30. be able to.

図７は、本発明の一実施例による保護ガラスを製造するための太陽電池モジュール用保護ガラスの製造方法に関するブロック線図である。   FIG. 7 is a block diagram relating to a method of manufacturing a protective glass for a solar cell module for manufacturing a protective glass according to an embodiment of the present invention.

図７に示されたように、太陽電池モジュール用保護ガラスの製造方法２００は、複数のガラスビーズを設ける段階２１０と、封止材にガラスビーズを水平方向に配列する段階２２０、及び熱処理して封止材にガラスビーズを付着する段階２３０を含む。   As shown in FIG. 7, the method 200 for manufacturing a protective glass for a solar cell module includes a step 210 of providing a plurality of glass beads, a step 220 of horizontally arranging glass beads on a sealing material, and a heat treatment. Attaching 230 glass beads to the encapsulant.

複数のガラスビーズを設ける段階２１０は、球状または半球状からなる複数のガラスビーズ１１０を設ける。ここで、ガラスビーズ１１０の直径は、３．２ｍｍ〜８．０ｍｍからなってもよい。   In the step 210 of providing a plurality of glass beads, a plurality of glass beads 110 having a spherical shape or a hemispherical shape are provided. Here, the glass beads 110 may have a diameter of 3.2 mm to 8.0 mm.

そして、ガラスビーズ１１０は、外部の衝撃等から太陽電池セル２０を保護して、入射する光の反射を防ぎ、光透過率を向上させるために低鉄分強化ガラスで形成されてもよい。また、ガラスビーズ１１０の表面を無反射コーティング（Ａｎｔｉ-Ｒｅｆｌｅｃｔｉｏｎ Ｃｏａｔｉｎｇ）処理して、入射する光の反射を最小限にすることができる。   The glass beads 110 may be formed of low iron tempered glass in order to protect the solar battery cell 20 from external impacts, prevent reflection of incident light, and improve light transmittance. Further, the reflection of incident light can be minimized by performing anti-reflection coating on the surface of the glass beads 110.

封止材にガラスビーズを水平方向に配列する段階２２０は、封止材４０の上部及び下部のうち少なくともいずれかにガラスビーズ１１０を水平方向に配列する。ここで、ガラスビーズ１１０は、互いに離隔して配置されてもよいが、屈折率を向上させるためにガラスビーズ１１０の外周面が互いに接触されるように形成することが望ましい。   In the step 220 of arranging the glass beads in the sealing material in the horizontal direction, the glass beads 110 are arranged in the horizontal direction in at least one of the upper part and the lower part of the sealing material 40. Here, the glass beads 110 may be spaced apart from each other, but it is desirable to form the glass beads 110 such that the outer peripheral surfaces of the glass beads 110 are in contact with each other in order to improve the refractive index.

熱処理して封止材にガラスビーズを付着する段階２３０は、封止材４０及びガラスビーズ１１０を熱処理して、封止材４０にガラスビーズ１１０を付着する。このとき、封止材４０は、ガラスビーズ１１０より融点の低い透明樹脂の素材からなっているため、封止材４０が溶融されて封止材４０にガラスビーズ１１０が付着することができる。   In the step 230 of heat-treating the glass beads to the sealing material 230, the glass beads 110 are attached to the sealing material 40 by heat-treating the sealing material 40 and the glass beads 110. At this time, since the sealing material 40 is made of a transparent resin material having a melting point lower than that of the glass beads 110, the sealing material 40 is melted and the glass beads 110 can adhere to the sealing material 40.

そうすると、図３に示されたように、封止材４０の上部に付着した太陽電池モジュール用保護ガラス１００Ａを獲得することができる。   Then, as shown in FIG. 3, the solar cell module protective glass 100 </ b> A attached to the upper portion of the sealing material 40 can be obtained.

図８は、本発明の別の実施例による保護ガラスを製造するための太陽電池モジュール用保護ガラスの製造方法に関するブロック線図である。図８に示されたように、太陽電池モジュール用保護ガラスの製造方法３００は、複数のガラスビーズを設ける段階３１０と、ガラスビーズを水平方向に配列する段階３２０と、ガラスビーズにガラス溶液を注入して保護ガラスを形成する段階３３０を含む。   FIG. 8 is a block diagram relating to a method of manufacturing a protective glass for a solar cell module for manufacturing a protective glass according to another embodiment of the present invention. As shown in FIG. 8, a method 300 for manufacturing a protective glass for a solar cell module includes a step 310 of providing a plurality of glass beads, a step 320 of arranging glass beads in a horizontal direction, and injecting a glass solution into the glass beads. Forming a protective glass 330.

複数のガラスビーズを設ける段階３１０は、球状または半球状からなる複数のガラスビーズ１１０を設ける。具体的に、ガラスビーズ１１０は、３．２ｍｍ〜８．０ｍｍの直径を有する球状からなることが望ましい。   In step 310 of providing a plurality of glass beads, a plurality of glass beads 110 having a spherical or hemispherical shape are provided. Specifically, the glass beads 110 are preferably formed of a spherical shape having a diameter of 3.2 mm to 8.0 mm.

ガラスビーズを水平方向に配列する段階３２０は、ガラスビーズ１１０が安着する面が平らに形成された保護ガラス製造フレーム内に、ガラスビーズ１１０を水平方向に配列する。ここで、保護ガラス製造フレームは、ガラスビーズ１１０の離脱を防ぐために上部の開口したボックス形態からなってもよい。   In step 320, the glass beads 110 are horizontally arranged in a protective glass manufacturing frame having a flat surface on which the glass beads 110 are seated. Here, the protective glass manufacturing frame may be in the form of a box with an upper opening in order to prevent the glass beads 110 from being detached.

ガラスビーズ１１０は、互いに離隔して配置されてもよいが、屈折率を向上させるためにガラスビーズ１１０の外周面が接触されるように形成することが望ましい。ガラス溶液を注入して保護ガラスを形成する段階３３０は、ガラスビーズ１１０の配置された保護ガラス製造フレームの内部に、溶融されたガラス溶液を注入して保護ガラスを形成する。つまり、ガラスビーズ１１０らの間の隙間にガラス溶液を注入して硬化することで、複数のガラスビーズ１１０らを接合することである。   The glass beads 110 may be spaced apart from each other, but it is desirable to form the glass beads 110 so that the outer peripheral surfaces of the glass beads 110 are in contact with each other in order to improve the refractive index. In the step 330 of injecting the glass solution to form the protective glass, the molten glass solution is injected into the protective glass manufacturing frame in which the glass beads 110 are arranged to form the protective glass. That is, a plurality of glass beads 110 are joined by injecting a glass solution into a gap between the glass beads 110 and curing.

保護ガラス製造フレームの内部に、ガラス溶液を注入して保護ガラスを形成する段階３３０は、ガラス溶液をガラスビーズ１１０の高さの１／２未満に注入する過程を含んでもよい。これにより、ガラス溶液を注入しても、ガラスビーズ１１０の上部は、半球状を維持することができるため、ガラスビーズ１１０の内部に入射する光の反射率を下げることができる。   The step 330 of injecting the glass solution into the protective glass manufacturing frame to form the protective glass 330 may include injecting the glass solution to less than half of the height of the glass beads 110. Thereby, even if the glass solution is injected, the upper part of the glass beads 110 can maintain a hemispherical shape, so that the reflectance of light incident on the inside of the glass beads 110 can be lowered.

一方、太陽電池モジュール用保護ガラスの製造方法３００は、ガラス溶液を注入して保護ガラスを形成する段階３３０以降に、保護ガラス製造フレームから保護ガラスを分離する過程をさらに含んでもよい。そうすると、図５に示された形態の太陽電池モジュール用保護ガラス１００Ｂを獲得することができる。   Meanwhile, the solar cell module protective glass manufacturing method 300 may further include a process of separating the protective glass from the protective glass manufacturing frame after the step 330 of injecting the glass solution to form the protective glass. If it does so, the protection glass 100B for solar cell modules of the form shown by FIG. 5 can be acquired.

一方、太陽電池モジュール用保護ガラス１００Ｂは、外部の衝撃等から太陽電池セル２０を保護して、入射する光の反射を防ぎ、光透過率を向上させるために低鉄分強化ガラスで形成されてもよい。また、獲得した太陽電池モジュール用保護ガラス１００Ｂの表面を無反射コーティング（Ａｎｔｉ-Ｒｅｆｌｅｃｔｉｏｎ Ｃｏａｔｉｎｇ）処理することで、入射する光の反射を最小限にすることができる。   On the other hand, the solar cell module protective glass 100B may be formed of a low iron content tempered glass in order to protect the solar cells 20 from external impacts, prevent reflection of incident light, and improve light transmittance. Good. Moreover, the reflection of the incident light can be minimized by subjecting the obtained surface of the protective glass 100B for the solar cell module to a non-reflection coating process.

本発明は、添付図面に示された一実施例を参照して説明したが、これは例示的なものに過ぎず、当該技術分野で通常の知識を有する者であれば、これより多様な変形及び均等な別の実施例が可能であることは理解できるだろう。よって、本発明の真の保護範囲は、添付の請求範囲のみにより定めるべきである。   Although the present invention has been described with reference to one embodiment shown in the accompanying drawings, this is merely illustrative, and various modifications may be made by those having ordinary skill in the art. It will be understood that other equivalent embodiments are possible. Accordingly, the true protection scope of the present invention should be determined solely by the appended claims.

１０…下部基板
２０…太陽電池セル
３０…フレーム
４０…封止材
１００Ａ、１００Ｂ…保護ガラス
１１０…ガラスビーズ
１２０…ガラス基板 DESCRIPTION OF SYMBOLS 10 ... Lower substrate 20 ... Solar cell 30 ... Frame 40 ... Sealing material 100A, 100B ... Protective glass 110 ... Glass bead 120 ... Glass substrate

前記課題を達するために本発明による太陽電池モジュール用保護ガラスは、球状または半球状からなり、水平方向に配列された複数のガラスビーズを含む。そして、複数のガラスビーズは、封止材の上部及び下部のうち少なくともいずれかに配置される。また、本発明による太陽電池モジュール用保護ガラスは、以下の（１）〜（４）いずれか一つの特徴を有する。
（１）ガラスビーズの直径は、前記封止材の厚さより大きい。
（２）ガラスビーズは、低鉄分強化ガラス（Ｔｅｍｐｅｒｅｄ ｌｏｗ-ｉｒｏｎ ｇｌａｓｓ）で形成されている。
（３）ガラスビーズは、無反射コーティング（Ａｎｔｉ-Ｒｅｆｌｅｃｔｉｏｎ Ｃｏａｔｉｎｇ）処理されている。
（４）ガラスビーズの直径は、３．２ｍｍ〜８．０ｍｍである。
In order to achieve the above object, the protective glass for a solar cell module according to the present invention includes a plurality of glass beads which are spherical or hemispherical and arranged in a horizontal direction. The plurality of glass beads are disposed at least one of the upper part and the lower part of the sealing material. Moreover, the protective glass for solar cell modules according to the present invention has any one of the following features (1) to (4).
(1) The diameter of the glass beads is larger than the thickness of the sealing material.
(2) The glass beads are formed of low iron-reinforced glass (Tempered low-iron glass).
(3) The glass beads are subjected to anti-reflection coating treatment.
(4) The diameter of the glass beads is 3.2 mm to 8.0 mm.

Claims (8)

フレーム内に設けられた太陽電池セルを密封する封止材に配置されて、前記太陽電池セルを保護する太陽電池モジュール用保護ガラスにおいて、
球状または半球状からなり、水平方向に配列された複数のガラスビーズを含むものの、
前記複数のガラスビーズは、前記封止材の上部及び下部のうち少なくともいずれかに配置される太陽電池モジュール用保護ガラス。 In the protective glass for a solar cell module, which is disposed in a sealing material for sealing the solar cell provided in the frame and protects the solar cell,
Although composed of a spherical or hemispherical shape and containing a plurality of glass beads arranged in a horizontal direction,
The plurality of glass beads is a protective glass for a solar cell module that is disposed on at least one of an upper part and a lower part of the sealing material. 前記封止材の上部及び下部のうち少なくともいずれかに付着するガラス基板をさらに含み、前記ガラスビーズは、前記ガラス基板の一面に配置される請求項１に記載の太陽電池モジュール用保護ガラス。   The protective glass for a solar cell module according to claim 1, further comprising a glass substrate attached to at least one of an upper part and a lower part of the sealing material, wherein the glass beads are disposed on one surface of the glass substrate. 前記ガラスビーズは、前記封止材の上部及び下部のうち少なくともいずれかに配置された状態で、熱処理されて前記封止材に付着する請求項１又は請求項２に記載の太陽電池モジュール用保護ガラス。   3. The solar cell module protection according to claim 1, wherein the glass beads are heat-treated and attached to the sealing material in a state of being arranged in at least one of an upper part and a lower part of the sealing material. Glass. 前記ガラスビーズは、低鉄分強化ガラス（Ｔｅｍｐｅｒｅｄ ｌｏｗ-ｉｒｏｎ ｇｌａｓｓ）で形成された請求項１ないし請求項３のいずれかに記載の太陽電池モジュール用保護ガラス。   The said glass bead is protection glass for solar cell modules in any one of Claim 1 thru | or 3 formed with the low iron content tempered glass (Tempered low-iron glass). 前記ガラスビーズは、無反射コーティング（Ａｎｔｉ-Ｒｅｆｌｅｃｔｉｏｎ Ｃｏａｔｉｎｇ）処理された請求項１ないし請求項３のいずれかに記載の太陽電池モジュール用保護ガラス。   The said glass bead is protection glass for solar cell modules in any one of the Claims 1 thru | or 3 by which the antireflective coating (Anti-Reflection Coating) process was carried out. 前記ガラスビーズの直径は、３．２ｍｍ〜８．０ｍｍである請求項１ないし請求項５のいずれかに記載の太陽電池モジュール用保護ガラス。   The protective glass for a solar cell module according to any one of claims 1 to 5, wherein the glass beads have a diameter of 3.2 mm to 8.0 mm. フレーム内に設けられた太陽電池セルを密封する封止材の上部及び下部のうち少なくともいずれかに配置されて、前記太陽電池セルを保護する太陽電池モジュール用保護ガラスの製造方法において、
球状または半球状からなる複数のガラスビーズを設ける段階；
前記ガラスビーズを水平方向に配列する段階；及び
前記ガラスビーズに溶融されたガラス溶液を注入して保護ガラスを形成する段階；
を含む太陽電池モジュール用保護ガラスの製造方法。 In the method for producing a protective glass for a solar battery module, which is disposed at least one of an upper part and a lower part of a sealing material for sealing the solar battery cell provided in the frame and protects the solar battery cell,
Providing a plurality of glass beads of spherical or hemispherical shape;
Arranging the glass beads in a horizontal direction; and injecting a molten glass solution into the glass beads to form a protective glass;
The manufacturing method of the protection glass for solar cell modules containing. 前記ガラス溶液を注入して保護ガラスを形成する段階は、
前記ガラス溶液を前記ガラスビーズの高さの１／２未満に注入する過程を含む請求項７に記載の太陽電池モジュール用保護ガラスの製造方法。 The step of injecting the glass solution to form a protective glass comprises:
The manufacturing method of the protective glass for solar cell modules of Claim 7 including the process of inject | pouring the said glass solution into less than 1/2 of the height of the said glass bead.
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